1. Hsu, H.H., Williams, S.A., Wohn, F.K., Margetan, F.J.: Phys. Rev. C16, 1626 (1977)
2. Nuclear Data Sheets, ed. Nucl. Data Group, Oak Ridge Nat. Lab., Oak Ridge, Tennessee
3. McGowan, F.K., Robinson, R.L., Stelson, P.H., Milner, W.T.: Nucl. Phys. A113, 529 (1968)
4. Rekstad, J., Tj�m, P.O.: J. Phys. G3, 411 (1977)
5. Nolan, M.F., Hall, I., Thomas, D.J., Throop, M.J.: J. Phys. A6, L57 (1973)